Kassadin's ultimate has many uses and is on a shorter cooldown than most, use it often.
Kassadin has multiple item paths; he can go caster via Mana and Ability Power or anti-caster with Cooldown Reduction and Magic Resist.
Try to get the Ancient Golem buff to counteract Riftwalk's increasing Mana cost.
Spread out when you see Sona so she can't make your entire team dance.
Kill Sona first, as she will heal up her team if left alone for too long.
The stats provided here emphasize several vital Kassadin versus Sona matchup statistics that may help you realize the distinctions between the pair. As an example, Kassadin’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Sona’s ratio of NaN, highlighting that Kassadin may be more central to his team's team fighting effectiveness than Sona. This observation is in large part fueled by the difference in kills.
Kassadin typically has a much larger longest killing spree than his counter does. Typically, he receives more damage than Sona. This often reflects differing health capacities, but it can also illustrate that the champ with increased health has less agility and thus is unable to escape further harm when engaged or poked.
Both League of Legends champs are great champions. Both have their pros and cons. In League's current meta, Kassadin usually loses when playing against Sona, with a 48.0% win rate. Therefore, Kassadin makes a bad counter to Sona.
While Kassadin does have a lower win rate compared to Sona, when facing one another, Kassadin also has a much greater level of difficulty that makes him a more complex champion to pick up and master. You should expect to face a difficult match when picking Kassadin into Sonaas his relative depth means you may not be able to reach his full potential without a significant amount of practice beforehand.
Additionally, Kassadin has some amount of CC and other utility, a similar amount to Sona. This makes her just as valuable during teamfights, especially when trying to counter champions with a lot of burst damage.
While there is not one best champion overall in League of Legends, in Kassadin vs Sona matchups, Sona is the better champ with a lower win rate, more champion depth, and a similar amount of utility to help out your teammates during teamfights.
Kassadin is a bad counter to Sona. You will do well by focussing your tactics on keeping up your CS and destroying objectives. If you are able to do that, you should hold your own as Kassadin against Sona.
If you would like to learn all of the intricacies of Kassadin to counter Sona during both the early game and mid / late game phases of League of Legends, you should keep reading to learn a few extra tricks and insights into this matchup. If you mind the build and suggestions presented here, you should grow your win rate significantly and be closer to League of Legends pro players.
Kassadin most often picks up much more CS as Sona. Champs who on average don't earn many minion kills typically don't require much CS to be valuable teammates, such as support champions. These kinds of champions are capable of scaling properly off of their abilities and first items alone. Yet, champions with a lot of CS, such as hyper-carries, usually require a lot of items to be effective. In either situation, try to exceed the values reported on this page to do well.
The top items to use in your Kassadin versus Sona build include Seraph's Embrace, Stormsurge, and Rod of Ages. When Kassadin bought at least these three pieces in his build, he did significantly better countering Sona than with many other common item sets. In fact, Kassadin had an average win rate of 48.0% when countering Sona with this build.
To have the greatest chance of defeating Sona as Kassadin, Kassadin players should take the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Out of all the runes that we analyzed for Kassadin vs Sona battles, this blending of runes yielded the greatest win rate. Moreover, these runes averaged a 48.0% win rate overall.
By default, tips, stats, and builds on how to beat Sona as Kassadin are presented for all ranked divisions. If you want to narrow the stats and builds to a distinct skill level, you should use the selection menu earlier in the counter matchup guide.